72 lines
1.7 KiB
LLVM
72 lines
1.7 KiB
LLVM
; RUN: not opt -S %s -verify 2>&1 | FileCheck %s
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #too_few_label_constraints
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define void @too_few_label_constraints() {
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callbr void asm sideeffect "#too_few_label_constraints", "!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK-NOT: Number of label constraints does not match number of callbr dests
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define void @correct_label_constraints() {
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callbr void asm sideeffect "${0:l} ${1:l}", "!i,!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #too_many_label_constraints
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define void @too_many_label_constraints() {
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callbr void asm sideeffect "#too_many_label_constraints", "!i,!i,!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK: Label constraints can only be used with callbr
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; CHECK-NEXT: #label_constraint_without_callbr
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define void @label_constraint_without_callbr() {
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call void asm sideeffect "#label_constraint_without_callbr", "!i"()
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ret void
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}
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #callbr_without_label_constraint
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define void @callbr_without_label_constraint() {
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callbr void asm sideeffect "#callbr_without_label_constraint", ""()
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to label %1 [label %2]
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1:
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ret void
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2:
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ret void
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}
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;; Ensure you cannot use the return value of a callbr in indirect targets.
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: #test4
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define i32 @test4(i1 %var) {
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entry:
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%ret = callbr i32 asm sideeffect "#test4", "=r,!i"() to label %normal [label %abnormal]
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normal:
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ret i32 0
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abnormal:
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ret i32 %ret
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}
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